Selective reduction and homologation of carbon monoxide by organometallic iron complexes.

Selective reduction and homologation of carbon monoxide by organometallic iron complexes.
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DOI:
10.1038/s41467-018-06242-w
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发表时间:
2018-09-14
影响因子:
16.6
通讯作者:
Kays DL
Kays DL
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Sharpe HR;Geer AM;Taylor LJ;Gridley BM;Blundell TJ;Blake AJ;Davies ES;Lewis W;McMaster J;Robinson D;Kays DL

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一氧化碳是碳氢化合物工业生产的关键C1原料,每年用于制造数百万吨化学品,燃料和溶剂。许多过渡金属配合物可以与CO配位,但在定义明确的化合物中,通过两个或多个CO部分在过渡金属中心的断裂和随后的偶联形成新的C-C键仍然是一个挑战。在这里,我们报告使用低配位铁(II)配合物的选择性切断和同源的CO提供不寻常的方酸和铁羧酸盐在环境温度和压力。的配体框架的修改允许的隔离和结构表征的建议metallacyclicFe(II)卡宾中间体。这些结果表明,与适当选择的支持配体,它是可能的裂解和同系物一氧化碳在温和的条件下使用丰富的和环境友好的低配位,第一行过渡金属。金属介导的CO活化C-C偶联反应是一种有价值的一氧化碳稳定化方法。在这里,作者使用低配位铁(II)配合物的选择性切断和同源的CO提供不寻常的方酸和铁羧酸盐在温和的条件下。
Carbon monoxide is a key C1 feedstock for the industrial production of hydrocarbons, where it is used to make millions of tonnes of chemicals, fuels, and solvents per annum. Many transition metal complexes can coordinate CO, but the formation of new C−C bonds in well-defined compounds from the scission and subsequent coupling of two or more CO moieties at a transition metal centre remains a challenge. Herein, we report the use of low-coordinate iron(II) complexes for the selective scission and homologation of CO affording unusual squaraines and iron carboxylates at ambient temperature and pressure. A modification of the ligand framework allows for the isolation and structural characterisation of a proposed metallacyclic Fe(II) carbene intermediate. These results indicate that, with the appropriate choice of supporting ligands, it is possible to cleave and homologate carbon monoxide under mild conditions using an abundant and environmentally benign low-coordinate, first row transition metal. Metal-mediated activation of CO for C-C coupling reactions is a valuable approach to carbon monoxide valorization. Here, the authors use low-coordinate iron(II) complexes for the selective scission and homologation of CO affording unusual squaraines and iron carboxylates under mild conditions.
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